The situation is more complex in children, where the BMI threshold of obesity varies with age and sex. The charts below show how the BMI obesity threshold changes with age for boys and girls.

The American Council on Exercise (ACE) has a body fat chart that breaks it up into the following categories for women: There are several BMI calculators online. Some do more than just calculate ...

and people who identified as Mexican American. While BMI is a fixed calculation for all people, the digital BRI calculator tries to reflect differences in race and ethnic groups. That could be ...